BARIUM SULFATE COMPOSITE PARTICLES, RESIN COMPOSITION CONTAINING SAME, AND PROCESS FOR PRODUCING SAME

摘要

As barium sulfate which is used as a filler of a resin composition for an electronic equipment, a precipitated barium sulfate which is synthesized from barium sulfide contains a sulfur component as an impurity so that metal parts such as electrodes of electronic parts may be deteriorated and corroded by a hydrogen sulfide component volatilized from the barium sulfate to reduce the function, the durability, and the reliability of electronic equipment when used for resin compositions such as an ink, a film, and a sheet which are used for an electronic equipment. Barium sulfate composite particles having a zinc compound adhered to the particle surface and having an average particle diameter of 0.01 to 10 µm.